package com.itheima.common;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import java.sql.SQLIntegrityConstraintViolationException;

@ResponseBody
@ControllerAdvice(annotations = {RestController.class, Controller.class})
public class GlobalExceptionHandler {
    @ExceptionHandler(SQLIntegrityConstraintViolationException.class)
    public R<String> exceptionHandler(SQLIntegrityConstraintViolationException ex){
        if(ex.getMessage().contains("Duplicate entry")){//mysql插入数据时，出现Duplicate entry 'xxxxx' for key 'yyyy'的问题。违反了主键的唯一性
            String[] split = ex.getMessage().split(" ");
            String msg = split[2]+"已存在";
            return R.error(msg);
        }
        return R.error("未知错误");
    }
        @ExceptionHandler(CustomException.class)
    public R<String> exceptionHandler(CustomException ex){
        return  R.error(ex.getMessage());
        }
}
